Up 4, Rose in driver's seat at BMW

Justin Rose kept it simple even as Cog Hill got a little harder Saturday, making only one bogey in his 2-under 69 that gave him a four-shot lead going into the final round of the BMW Championship.

Rose played a tidy round in mild sunshine and a swirling breeze. And while he failed to birdie any of the par 5s, he didn't make any of the big mistakes that hurt the other two players in the final group.

Mark Wilson, who started the day tied for the lead, played a five-hole stretch in 5 over on the back nine and shot 77. He played the last hour unsure if he would get a two-shot penalty for grounding his club in the bunker at No. 14, although he was cleared because his club was placed in the sand to keep his balance as he replaced his ball. He is eight shots back.

Webb Simpson was in contention until going from a bunker into the hazard and making double bogey on No. 17. He shot 73 and was six shots out of the lead.

Rose, who is at No. 34 in the FedEx Cup standings, should have no trouble getting into the top 30 who advance to the Tour Championship next week in Atlanta. He was at 13-under 200.

The closest player to him was John Senden of Australia, who needs to win to have any chance of making the Presidents Cup team. Senden had a rugged start, but had four birdies on his last eight holes for a 70.

LPGA: Teenager Lexi Thompson shot a 5-under 67 in the Navistar LPGA Classic in Prattville, Ala., and will begin today's final round with a five-stroke lead.

The 16-year-old is at 15-under 201 at the Robert Trent Jones Trail's Capitol Hill complex. South Korea's Meena Lee is second, and Tiffany Joh, Karen Stupples and Becky Morgan are tied for third at 8-under 208.

Thompson had four consecutive birdies on Nos. 6-9 and recorded six overall. She bogeyed the par-4 18th.

Thompson was a 14-year-old amateur when she was tied for the 2009 Navistar LPGA lead after two rounds before finishing 27th. She tied for 16th last year.

Joh made the biggest move with a 65 in the third round. She birdied her final two holes.

CHAMPIONS: Michael Allen shot a 4-under 68 to open a one-stroke lead over fellow Americans John Cook and Jay Don Blake after two rounds of the Songdo IBD Championship in Incheon, South Korea.

Cook and Blake shot 5-under 67s and are 9-under 135 heading into today's final round at Jack Nicklaus Golf Club Korea. Mark O'Meara (69) and David Peoples (70), a co-leader after the first round, were a stroke back at 8 under.